Values:
LOCALIZATION_STATE_UNSPECIFIED (0):
Not used.
LOCALIZATION_STATE_NOT_APPLICABLE (1):
Localization is not applicable for requested
language. This can happen when:
- The requested language was not supported by
Advisory Notifications at the time of
localization (including notifications created
before the localization feature was launched).
- The requested language is English, so only the
English text is returned.
LOCALIZATION_STATE_PENDING (2):
Localization for requested language is in
progress, and not ready yet.
LOCALIZATION_STATE_COMPLETED (3):
Localization for requested language is
completed.